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VizieR

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J/PASP/122/1397/s4g Spitzer Survey of Stellar Structure in Galaxies (Sheth+, 2010)
S4G catalog Version 2 (2013-09) (2352 rows)
  recno=1384
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ColumnValue  Explain   (UCD)
_RAJ200011 21 02.9016 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+53 10 10.632 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195011 18 13.4416 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+53 26 36.894 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon149.5305883 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+59.0391649 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
1384recno 1384  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
A   A indicates additions in S4G (version 2), compared to the original table (meta.note)

NameNGC3631  Galaxy name (meta.id;meta.main)
RAJ2000170.26209 deg (i) Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+53.16962 deg (i) Declination (J2000) (pos.eq.dec;meta.main)
amaj153.2 arcsec Semi-major axis at level µ(3.6um)=25.5mag(AB)/arcsec2 (phys.angSize.smajAxis)
PA -65.6 deg [-160/90] Position angle of major axis (pos.posAng)
ell 0.149   [0/1] Ellipticity (1-b/a) (src.ellipticity)
[3.6]10.443 mag Spitzer/IRAC 3.6um asymptotic magnitude (AB) (phot.mag;em.IR.3-4um)
e_[3.6] 0.001 mag Mean error on [3.6] (stat.error)
[4.5]10.841 mag Spitzer/IRAC 4.5um asymptotic magnitude (AB) (phot.mag;em.IR.4-8um)
e_[4.5] 0.001 mag Growth-curve fitting error in [4.5] (stat.error)
c31 5.237   [1/] r(75%)/r(25%) concentration index at 3.6um (meta.code;spect.index;em.IR.3-4um)
c42 4.396   5*log10(r(80%)/r(20%)) concentration index at 3.6um (meta.code;spect.index;em.IR.3-4um)
M3.6-20.144 mag Absolute magnitude at 3.6um (phys.magAbs;em.IR.3-4um)
M4.5-19.745 mag Absolute magnitude at 4.5um (phys.magAbs;em.IR.4-8um)
logM*10.163 [Msun] Stellar mass (phys.mass)
Dmean 13.102 Mpc Mean redshift-independent distance (pos.distance;pos.heliocentric)
e_Dmean 6.066 Mpc Standard deviation of Dmean (stat.error)
TT 5.2   Morphological type code (meta.code;src.morph.type)
e_TT 0.5   Error on TT (stat.error)
Vr 1162.7 km/s Heliocentric radial velocity from radio measurement (spect.dopplerVeloc;pos.heliocentric)
e_Vr 4.2 km/s Mean error on Vr (stat.error)

S4GS4G  See the NASA/IPAC details for this galaxy (meta.ref.url)
SimbadSimbad  ask the Simbad data-base about this object (meta.ref.url)
NEDNED  ask the NED data-base about this object (meta.ref.url)
LEDALEDA  ask the LEDA data-base about this object (meta.ref.url)
  
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